1,355,822 research outputs found
Recensione a Giovanni Murru, La cipolla del signor Taylor. Fascismo, propaganda, organizzazione scientifica del lavoro agricolo (1926-1935)
No full textRecensione a Giovanni Murru, La cipolla del signor Taylor. Fascismo, propaganda, organizzazione scientifica del lavoro agricolo (1926-1935
Sonia Livingstone, Giovanna Mascheroni et Maria Francesca Murru "Utilisation des réseaux socionumériques par les jeunes européens"
No full textSocial networking among European children: New findings on privacy, identity and connection
Social networking is arguably the fastest growing online activity among youth people. This article presents new
pan-European findings from the EU Kids Online project on how children and young people navigate the peer-to-peer
networking possibilities afforded by social networking sites, based on a survey of around 25,000 children (1000 children
in each of 25 countries). In all, 59 % of European 9-16 year olds who use the internet have their own social networking
profile. Despite popular anxieties of lives lived indiscriminately in public, half have fewer than fifty contacts, most contacts
are people already known to the child in person, and over two thirds have their profiles either private or partially private.
The focus of the analysis, then, is to understand when and why some children seek wider circles of online contacts, and why
some favour self-disclosure rather than privacy. Demographic differences among children, cultural factors across countries,
and the specific affordances of social networking sites are all shown to make a difference in shaping the particularities of
children’s online practices of privacy, identity and connection.
Keywords: social networking sites, children and youth, privacy, identity, risk, connection.L’utilisation des réseaux socionumériques est sans doute l’activité en ligne qui enregistre actuellement la crois-
sance la plus rapide parmi les jeunes. Cet article présente de nouvelles conclusions pan-européennes du projet EU
Kids Online sur la façon dont les enfants et les jeunes exploitent les possibilités des réseaux peer-to-peer offertes par
les réseaux socionumériques, en se basant sur une enquête menée auprès d’environ 25 000 jeunes (1 000 enfants de
chacun des 25 pays de l’Union européenne). Globalement, 59 % des jeunes internautes européens âgés de 9 à 16 ans
disposent de leur propre profil sur un site de réseau social. Malgré des craintes, couramment exprimées, de voir la
vie des jeunes entièrement exposée en public, la moitié ont moins de cinquante contacts, la plupart des contacts sont
des personnes que l’enfant connaît déjà personnellement, et plus de deux tiers ont des profils privés ou partiellement
privés. L’objectif de l’analyse est donc de comprendre quand et pourquoi certains enfants cherchent à élargir leurs
cercles de contacts en ligne, et pourquoi certains préfèrent dévoiler leur intimité plutôt que protéger leur vie privée.
L’étude montre que les différences démographiques entre les enfants, les facteurs culturels dans les différents pays,
et les affordances spécifiques des réseaux socionumériques ont tous une influence sur l’élaboration des pratiques en
ligne des enfants en matière de vie privée, d’identité et de connexions sociales.
Mots-clés : réseaux socionumériques, enfants et jeunes, vie privée, identité, risque, connexions sociales
DE CIFRIS SEMINARS
No full textDe Componendis Cifris APS was formally established only in December 2022, but it has been active for many years in meetings and events. One of its initiatives has been the organization of many seminars. It is therefore fitting that a Koine book collects some of our best seminars. Some results may be outdated, but the papers still provide valuable insights into many areas of cryptographic research and also serve as nice introductions. The volume concludes with two interesting and original contributions.
We believe that the volume’s editors, Danilo Bazzanella, Giulio Codogni, Nadir Murru and Roberto Zunino, have done a great job in selecting an interesting sample of seminars and two invited papers: isogeny-based post-quantum cryptography and integer factorization
Macao prima e oltre i social media. La creazione dell'inatteso come logica di mobilitazione
No full textIn May 2012 a skyscraper was occupied in Milan by a group of artists and art workers which gathered around Macao, claiming a new role for art and culture in society. The paper investigates the role of digital communication practices in Macao's contentious action. Starting from an overview of the ongoing debate about the relationship between digital media and political protest, the contribution shows the eccentricity of Macao with respect to three already established analytical models: the logic of connective action (Bennett and Segerberg 2013), the concept of communicative cultures (Kavada 2012), and the logic of aggregation (Juris 2012). On the basis of the empirical analysis of media practices (Couldry 2012) together with the critical discourse analysis (Fairclough 1992) of the symbolic production of Macao, the article will propose the notion of «eventful logic» as a new pragmatic concept through which the strategies and the logics of collective action through social media can be satisfactorily explained
MURRU C (2021), Recensione a L'italiano e la scienza tra Medioevo e Rinascimento. Le vie della lingua, della letteratura, dell'arte, a c. di Lorenzo Baccini, Francesco Brenna, Barbara Fanini, Giulio Vaccaro, Giulia Virgilio, Valerio Zanetti, Firenze, Cesati, 2022, in "La Rassegna della letteratura italiana", 2022/02
No full textReal time forecasts through an earthquake clustering model constrained by the rate-and-state constitutive law compared with a purely stochastic ETAS model
No full textWe propose an earthquake clustering model based on the
popular concept of epidemic models. In these models every
earthquake can be regarded as both triggered by previous
events and as a potential triggering event for subsequent earthquakes
(Ogata 1988, 1998; Ogata and Zhuang 2006 and reference
therein; Console and Murru 2001; Console et al. 2003;
Console et al. 2006a, 2006b; Helmstetter and Sornette 2002a,
2002b, 2003 for reviews; and Vere-Jones 2006 for review on the
use of stochastic models for earthquake occurrence). The occurrence-
rate density at any time and geographical location is computed
by the contribution of every previous event using a kernel
function that takes into proper account: (a) the magnitude of
the triggering earthquake, (b) the spatial distance from the triggering
event, and (c) the time interval between the triggering
event and the instant considered for the computation. The magnitude
distribution adopted here is the Gutenberg-Richter law
(Gutenberg and Richter 1944). The above-mentioned criteria
are implemented through the introduction of the rate-and-state
constitutive law in a previously existing epidemic algorithm.
The validity of the model can be tested in an exercise of realtime
forecast.Published49-563.1. Fisica dei terremotiJCR Journalreserve
La diversità briofitica è influenzata dalla presenza delle piante vascolari aliene? Il caso delle dune marine costiere della Sardegna
No full textLe briofite sono capaci di colonizzare e stabilizzare i terreni sabbiosi, rappresentando elementi chiave nell'ecologia delle dune: per questo motivo la diversità della brioflora può essere considerata come un utile indicatore per valutare la presenza di impatti negativi in questi ecosistemi. Obiettivo dello studio è valutare gli effetti della presenza di piante vascolari esotiche (Acacia saligna, Carpobrotus spp) sull'abbondanza, distribuzione e diversità briofitica delle dune costiere marine. La diversità e la distribuzione di briofite sono state rilevate in ambienti costieri di dune sabbiose, prendendo come caso di studio un sistema di dune costiere all'interno del SIC ITB040020 “Isola dei Cavoli, Serpentara, Punta Molentis”, compreso integralmente nell’Area Marina Protetta di Capo Carbonara, all’estremità meridionale della costa orientale della Sardegna (Italia). La vegetazione di questo SIC è in gran parte compromessa dalla pressione antropica con opere di urbanizzazione turistica e da rimboschimenti effettuati utilizzando specie esotiche, in particolare nella fascia retrodunale. Il campo dunale è inoltre ampiamente frazionato ed alterato dal punto di vista morfologico da numerosi impianti turistici. La spiaggia di Porto Giunco, formata da un cordone sabbioso subrettilineo delimitato da affioramenti granitici, presenta campi dunali fortemente degradati (. Il settore centrale retrodunale della spiaggia è occupato dallo stagno di Notteri. Entrambe le aree prese in considerazione sono state sottoposte, negli anni passati, ad opere di ingegneria naturalistica, al fine di tutelare, conservare e ripristinare la vegetazione tipica dunale e favorire l’accumulo della sabbia e la formazione delle dune. Tali aree, nell’ambito di un progetto LIFE, sono state sottoposte a eradicazione di piante aliene invasive come Carpobrotus spp., Agave americana e Opuntia ficus-indica e taglio di Acacia saligna.
Oltre al censimento briofitico dell’area sono stati eseguiti 100 rilevamenti, seguendo un disegno di campionamento casuale semplice: per ciascun sito di campionamento materializzato con un quadrato di 60 cm di lato, è stato rilevata la presenza/assenza e la copertura in percentuale delle specie briofitiche e delle piante vascolari. In totale, per la brioflora sono state censite 16 Briofite, 15 della Divisione Bryophyta e 1 Hepaticophyta. La più comune è la famiglia delle Pottiaceae con 9 specie seguita dalle Bryaceae con 3 specie, l’unica epatica afferisce al genere Riccia. Le specie più comuni sono risultate essere Tortella flavovirens e Tortella squarrosa in conformità con le caratteristiche dell’habitat (Murru et al. 2018). Le specie esotiche quali Acacia saligna, Agave americana, Carpobrotus spp, Myoporus tetrandum e Opuntia ficus-indica sono presenti nel 13% dei campioni. Nei nostri dati la relazione tra ricchezza di specie aliene e ricchezza briofitica e piante vascolari è debole e non significativa. Tortella flavovirens, Bryum radiculosum e Bryum dichotomum sono tipici degli habitat costieri e delle dune sabbiose (Brullo et al., 1991; Guerra & Puche, 1984) e pertanto potrebbero essere proposti come ottimi indicatori di impatto derivato dall'invasione biologica e disturbo antropico (Zedda et al 2010
«Con parole conte ed acconce». Osservazioni sul lessico degli «Scritti giovanili» di Roberto Longhi
No full textIl saggio prende in considerazione un corpus costituito dagli scritti composti da Roberto Longhi nel periodo compreso tra il 1912 e il 1922 e dall’autore stesso selezionati per il primo volume della raccolta delle Opere complete, edita da Sansoni, gli Scritti giovanili.
A una prima parte dedicata a un’analisi generale della lingua di Longhi segue una più specifica indagine lessicale. Infine si offre un glossario costruito a partire da un nucleo di voci isolate per dimostrare la persistenza delle innovazioni lessicali longhiane e realizzato in modo da evidenziare la continuità degli usi in ambito artistico: la selezione di voci risponde alla volontà di misurare l’apporto innovativo fornito da Longhi alla lingua della critica d’arte, il quale si esplica mediante la creazione di espressioni nuove o di nuove accezioni per vocaboli già esistenti, e si manifesta nel momento in cui questa inventiva continua a dimostrare la propria vitalità nei decenni successiviThe essay examines a corpus of Roberto Longhi’s works written between 1912 and 1922 and those chosen by the author himself for the first volume of his Opere complete published by Sansoni, the Scritti giovanili.
The first section, which makes a general analysis of Longhi’s language, is followed by a more specific lexical search. finally a glossary constructed from a number of isolated entries reveals the persistance of Longhi’s lexical innovations.
This glossary is compiled in such a way as to evidence the continuity of their use in the field of art history. The choice of entries allows an evaluation of Longhi’s innovative contribution to the language of art criticism; this is developed in the invention of new expressions or new meanings for already existing words, and is seen in the way his creativity continues to show its vitality in the following decade
Reieluukaela murru tervise- ja majandusmõju Eestis
No full textVäitekirja elektrooniline versioon ei sisalda publikatsiooneReieluukaela murd vanemas eas on seotud olulise elukvaliteedi languse, liigsuremuse ja kuluga. Arenenud maades saab iga kuues üle 50-aastane naine eluea jooksul reieluukaela murru, kuni 20% haigetest sureb aasta jooksul peale murdu ja murrueelne elukvaliteet taastub vähem kui pooltel haigetest.
Samas on tervisekaotuse hinnangutes veel palju ebaselget. Esmashaigestumus Euroopa riikides varieerub, kuid erinevuse põhjused ei ole lõpuni selged. Reieluukaela murruga seotud kulud suurenevad, kuid andmed tervishoiu- ja sotsiaalteenuste kasutuse kohta on ebapiisavad. Reieluukaela murru epidemioloogilised ja kuluandmed Eestis on puudulikud.
Uurimistöö eesmärk oli reieluukaela murruga seotud tervise- ja majandusmõju hindamine ≥50-aastastel inimestel Eestis 2005-2016 aastal. Hinnati reieluukaela murru avaldumust (ökoloogiline uuring), liigsuremust (rahvastikupõhine retrospektiivne kohortuuring) ja murruhaigete elukvaliteeti, ressursikasutust ja kulusid (prospektiivne kohortuuring). Andmed saadi Eesti Haigekassast, reieluukaela murruga haigete intervjuudest ja Eesti statistika andmebaasist.
Leiti, et reieluukaela murru avaldumus Eesti naistel oli suhteliselt madal, kuid meestel üks Euroopa kõrgematest. Murdude arvu suurenemine vaatlusalusel perioodil oli tingitud rahvastiku vananemisest. Murrujärgne elukvaliteet oli vaid 7% võimalikust ja selle taastumine aeglasem kui paljudes Euroopa riikides. Murrujärgse eriarstiabi ja perearsti teenuse kasutus oli võrreldav Rootsiga, kuid taastusravi, koduõenduse ja sotsiaalabi kasutus väga madal. Seda kompenseeris lähedaste abi, mida kasutas 18 kuu jooksul 80% haigetest. Reieluukaela murru 18 kuu kogukulu oli >8000 eurot haige kohta, mis on võrreldav infarkti ja insuldi kogukuluga.
Samuti leiti, et reieluukaela murd on oluline iseseisev suremuse riskifaktor. Keskmine murrujärgne üldsuremus ühe aasta jooksul oli 28% ehk 20% võrra (3-4 korda) kõrgem kui ilma murruta isikuil, olles võrreldav dementsuse või metastaatilise vähi korral esinevaga. Liigsuremus nooremates vanusrühmades (50-69 aastat) oli Eestis suurem kui lääneriikides. Kaasuvate haiguste mõju reieluukaela murru liigsuremusele on väike ja ei oma liigsuremuse vähendamisel kriitilist rolli. Liigsuremuse vähendamine saab olla võimalik murru ja selle tüsistuste vältimise ning meditsiinilise ja sotsiaalse rehabilitatsiooni parandamisega.
Tulemused võimaldavad reieluukaela murruga seotud summaarse tervisekaotuse hindamist, sihtrühmade määratlemist murruga seotud suremuse vähendamiseks ja informeeritud tervise- ja sotsiaalpoliitiliste otsuste langetamist. Tulemusi saab kasutada ka reieluukaela murru ennetus- ja ravimeetmete kulutõhususe hindamisel. Teadaolevalt on tegemist esimese tervikliku reieluukaela murru tervise- ja majandusmõju hindamisega Kesk- ja Ida-Euroopas.Hip fracture in older age is associated with significant loss of quality of life, excess mortality, and cost. Every 6-7th woman over 50 years will experience a hip fracture, over 20% of patients die within one year, and less than half of patients recover fully.
However, the disease burden of hip fracture is not well established. The incidence among European countries varies, while the reasons for this variability are not certain. Costs are increasing, but the data on health and social care use are insufficient. The epidemiologic and cost data for Estonia are incomplete.
The aim of the research was to assess the health and economic impact of hip fracture among individuals aged over 50 years in Estonia in 2005-2016. We estimated the incidence (ecological study), excess mortality (population-based retrospective cohort study), and the loss of quality of life, resource use, and cost (prospective cohort study). The data were collected from the Estonian Health Insurance Fund database, Statistics Estonia, and from patient interviews.
The hip fracture incidence in Estonian women was among the lowest, and the rate in men among the highest in Europe. The increasing number of fractures over the period of observation was a result of population aging. Patient’s quality of life after a fracture was only 7%, and the recovery was slower than in many other European countries. Fracture-related specialty and primary care use was comparable to that in Sweden, but the use of rehabilitation, home nursing, and social care was very low. The shortfall may explain the high use of informal care. The hip fracture related societal cost during 18 months was >8000 euros per patient, comparable to that for myocardial infarction or stroke.
Hip fracture is a strong independent risk factor for death. The aggregated risk of all-cause death at 1 year after fracture was 28%, being 20% or 3-4 times higher than that without fracture, comparable to that for dementia and cancer. The excess mortality in younger (50-69 years) patients in Estonia was higher than in the Western countries. The impact of comorbidities on excess mortality was modest. Hip-fracture related deaths could be avoided by preventing fractures and their complications and by improving post-fracture care.
These findings should help to estimate the total societal burden of hip fracture, define target groups for reducing mortality after hip fracture, and inform the related health and social policy. The results may also be used in economic evaluations for selecting cost-effective interventions for hip fracture prevention and care. To our knowledge, this is the first comprehensive estimation of hip fracture health and economic impact in Central and Eastern Europe
A Hybrid Genetic-Neural Architecture for Stock Indexes Forecasting
No full textIn this paper, a new approach for time series forecasting is presented. The forecasting activity results from the interaction of a population of experts, each integrating genetic and neural technologies. An expert of this kind embodies a genetic classifier designed to control the activation of a feedforward artificial neural network for performing a locally scoped forecasting activity. Genetic and neural components are supplied with different information: The former deal with inputs encoding information retrieved from technical analysis, whereas the latter process other relevant inputs, in particular past stock prices. To investigate the performance of the proposed approach in response to real data, a stock market forecasting system has been implemented and tested on two stock market indexes, allowing for account realistic trading commissions. The results pointed to the good forecasting capability of the approach, which repeatedly outperformed the “Buy and Hold” strategy
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